ignition problem???
 

My car wont start...sometimes. i dont know why. it turns over so its not the starter but it just doesnt start sometimes. i dont know why. im not exactly sure what to do. after i try to start it, i wait 10-20 minutes then it starts.please help! this is my first supra. anybody have any ideas?

Well with the fuel injection. If you're pumping the gas to get it started you may just be flooding it out and it all has to clear out to start after the fact.

You're going to have to be more specific before we can give you any real help.

Yeah, typically a fueling problem. Either the cold start injector isn't doing it's job while cranking or the fuel rail is loosing too much pressure at rest or the engine bay is too hot and the fuel is vaporizing in the rail.

Does this occur all the time, only when cold or only when hot?

The easiest thing to start with is pulling and cleaning the cold start injector. Is your car a turbo or N/A?

thanks guys

by the way it is a turbo. and it starts in the cold sometimes and the hot sometimes. i dont notice a pattern.

Start with the CSI (cold start injector): MK3 TSRM On-Line

That's what I was thinking as well but didn't want propagandize bull shite.

thanks but my engine is a 7mgte. that diagram is for a 7mge. does it matter?

Take a look though the link I posted... it's got the info on both mixed throughout. Although, this circuit is the same from one to the next, just the locations of parts changes.

what is the condition of the wires connected to the cam position sensor ?

wires on 20+ year old supras get dried out and brittle

if you had a cold start injector issue it would still start but it wouldn't start on the first attempt maybe the second or third

it would be interesting to check if you are getting spark to the plugs when it won't start .

i had an issue like this and it was related to mangled wires going to the CPS

I think..., so IMO. I thik the cold start injector has the probability of being something that just shucks or shucks very quickley.

I don't see it working half ass'd for too awful long at all.

But that's just my opinion.

CPS is a good possibility as well. Have you checked for error codes? Typically bad CPS wiring will result in error codes such as 12, 13 or 14.

cps
 

okay the cam position wires are coming out and are not covered well. the housing for the wires are coming off and one looks like its cut. is that the problem and how should i clean it up?

okay so i redid the plugs for the cps. i crimped the wires and connected them with male and female wire connectors not butt connectors. the car still wont start. i think it may be the fuel pump. when i tried starting it i saw the rpm guage bouncing a little and i heard the exhaust boggle a little. it did that a few times then it just stopped. what do you guys think it maybe? fuel pump? it seems that its getting spark thats why and the plugs were pretty clean.

I don't think it's your fuel pump.

I have to work on my piece right now.

I'll read this again later and see if something different clicks for me.

alright thanks. also there isnt supposed to be oil around the spark plugs area is there?

On your wiring you need to go to the local parts store and pick up some of that electrical heat wrap and macguyver those biotches. Flick ur bic bro.

No oil in the galley way. It's an oil free and coolant free zone. Try to keep it that way. Now you'll have to pull and clean all the plugs if there's any real oil in there.

thanks ill try those and get back to you.

okay so i got in my car today and it started. i was in my driveway slightly on a hill. (the front facing downward) last time i tried to start it i was on flat ground. my gas said it was at quarter tank. i topped her off today. but its been starting before that. before i put gas, i tried to start it and it started right away then died right away. it did that twice. then after that i started it about 10 more times and it fired up well. may it be that my fuel guage may be broken? and should i keep it always about more than half tank fuel??? get back to me please im becoming confused.:confused:

Well, if you filled it until full how many gallons did it take before the pump stopped? If it was a bit over 15 then yeah, your gauge could be shot or it could be the sender in the tank.

im not exactly sure. but, it was having trouble and would hardly start at about a quarter tank. once i actually got it started at quarter tank, i went straight to the gas station and i topped her off and shes been starting well every time.

Well, it's possible the gauge is off or the sender's bad... or perhaps you just had some bad fuel in there.

Yellow can of HEAT.
put in tank. top off. Supreme.

Run it empty.

Here's where I would run it bone dry. Pull in.
Get a can of ATF. insert funnel. add ATF to tank.
fill up. Supreme.
Fill up. Supreme.

Then run that half dry. Top off with your choice of non-leadery.
That was my 1st ever online impression of Tenacious D.

WHY???? I bet you're asking. Every body always asks why.
That is quickley followed by did..., you escape from the local tardery???

The atf lubricates your entire fuel injection system from the inside out it acts as a detergent and a lubricant. It aids in the break down of carbon scoring.

You'll smoke, but never mind they'll all be seeing the smoke soon enough.

Seafoam. Same thing. ATF works better and is half price.

You will notice rather quickley an improved throttle responce and a smoothness to your engine that you have probably never had otherwise known existed.

I promise. I stand by it. It is the mad truth.
Try it once and you can Thank me at your discretion.

No autographs. Hold you applause.
Yes...., I'm in rare form tonight.

ATF, yeah it cleans well and lubricates, but Techron does the same just as well (yes, just as well) and doesn't smoke like a mofo. It does cost more, but I'd rather spare my cat of the extra abuse. ;)

Don't even get me started on seafoam!!! UGH!!! GAHHHHHH!!!!!! EVIL!

I would add marvel mystery oil to my tank before I ever add seafoam again.

That product is hyped up and designed by hacks for niche market tuning geeks.

thanks for the help guys. my car seems to be running well now. its been starting everytime. and i fill up at chevron so i have techron. i look into that HEAT you were talking about. thanks.

If it's running alright now you can skip the Heat... I really don't know much about it... never even looked at a bottle. Like I said though, if it's an octane booster, forget it... not what you need right now.

Heat is one of those if'y looking products but I have used throughout my life and It has never failed me in anything I have used it in.

Looking around online (you wouldn't believe how difficult it was to find valid results when googling "heat fuel additive") what I found indicated that HEAT is really not much more than alcohol.

oh really? not much more than alcohol. thats interesting. now my problem is the alarm. does anyone know why the alarm just goes off sometimes. when the car is idling and the turbo timer is counting down, once its at 0 it shuts off normally and then the alarm goes off right away. but only sometimes. im not sure what to do. should i just rip out the alarm?

Correct.

I'm not trying to cure cancer.:)

I'm just saying. I have used it and it works.

:squint: Don't make me kick your a$$:eek3::dance:

I'm joking.